Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 85 for “"Vehicle performance"”.
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Anomaly detection methods for unmanned underwater vehicle performance data
… considers the problem of detecting anomalies in performance data for unmanned underwater vehicles(UUVs). UUVs collect a tremendous amount of data, which operators are required to analyze between missions to determine if vehicle systems are functioning properly. Operators are typically under heavy …
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Modeling and vehicle performance analysis of Earth and lunar hoppers
Planetary hoppers-vehicles which travel over the surface as opposed to on it-offer significant advantages over existing rovers. Above all, they are able to travel quickly and can overcome terrain obstacles such as boulders and craters. The Next Giant Leap team in the Google Lunar X- PRIZE …
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Entry vehicle performance analysis and atmospheric guidance algorithm for precision landing on Mars
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1990.
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Vehicle performance optimization utilizing the Air Turbo-Ramjet propulsion system; Methodology development and applications
… the benefits of ATR propulsion for tactical vehicles.</p> <p>ATR simulation codes were developed to support analysis of hypothetical ATR powered vehicles. Both turbojet powered and SRM powered vehicles were also evaluated against range and time of flight as the major evaluation criteria. This …
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Modeling and Simulation of Vehicle Performance in a UAV Swarm Using Horizon Simulation Framework
… of digital pheromones and a pheromone map. Each vehicle operates at steady-state flight conditions of 36 m/s with an altitude of 1,800 m, and utilize an LQR set-point controller to maneuver through the pheromone map. All pheromone and aircraft related models are written in Python to expand the …
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Axiomatic redesign : using Axiomatic Design to improve vehicle performance of the steering and suspension system
Every year, automobile manufacturers strive to improve upon their existing designs. Every year, they make small adjustments and try to optimize their designs. Unfortunately, this 'optimization' is often a compromise between multiple components and thus the individual components are not working as …
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Modeling dispersions in initial conditions for air-launched rockets and their effect on vehicle performance
… rocket's state at ignition can affect system performance and investigates a reference trajectory strategy to mitigate performance loss. First, representative vehicle configurations for a generic air-launch system are presented. Mass properties, propulsion characteristics, and vehicle …
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The effects of driving style and vehicle performance on the real-world fuel consumption of U.S. light-duty vehicles
Even with advances in vehicle technology, both conservation and methods for reducing the fuel consumption of existing vehicles are needed to decrease the petroleum consumption and greenhouse gas emissions of the U.S. light-duty vehicle fleet. One way to do this is through changes in driving style, …
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Evaluating the impact of advanced vehicle and fuel technologies in U.S. light duty vehicle fleet
… increase in oil use by the U.S. light-duty vehicle (LDV) fleet presents an extremely challenging energy and environmental problem. A variety of propulsion technologies and fuels have the promise to reduce petroleum use and greenhouse gas (GHG) emissions from motor vehicles. Previous work in …
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Central Tire Inflation for Agricultural Vehicles
… inflation system and instrumentation to measure performance were installed on a tractor and used to evaluate the vehicle performance on several hard surfaced test courses and in the field. The results showed a 99% improvement in ride, a 2% improvement in traction, a 10% decrease in rut depth, and …
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Truck Modeling Along Grade Sections
… important for the development of an exhaustive vehicle performance procedure. Analysis was done based on data collected at the Troutville weigh station. The characterization involves an analysis of vehicle class distribution, GVW (Gross Vehicle Weight) distribution, vehicle volume distribution, …
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Development of Predictive Vehicle Control System using Driving Environment Data for Autonomous Vehicles and Advanced Driver Assistance Systems
… are focusing on the development of advanced vehicle control systems such as autonomous vehicle systems and Advanced Driver Assistance Systems (ADAS). Furthermore, Driver Assistance Systems (DAS) such as cruise control, Anti-Lock Braking Systems (ABS), and Electronic Stability Control (ESC) …
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The benefits of 4WD drive for a high-performance FSAE electric racecar
This thesis explores the performance of Rear-Wheel Drive (RWD) and Four-Wheel Drive (4WD) FSAE Electric racecars with regards to acceleration and regenerative braking. The benefits of a 4WD architecture are presented along with the tools for further optimization and understanding. The goal is to …
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Calibration Procedure for a Microscopic Traffic Simulation Model
… immeasurable data describing driver behavior and vehicle performance characteristics. Engineers often use default values for parameters such as car-following sensitivity and gap acceptance because it can be difficult to obtain accurate estimates for these parameters. While recent research has …
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Optimal Vehicle Stability Control with Driver Input and Bounded Uncertainties
For decades vehicle control has been extensively studied to investigate and improve vehicle stability and performance. Such controllers are designed to improve driving safety while the driver is still in control of the vehicle. It is known that human drivers are capable to learn and adapt to their …
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Design of an underwater vertical glider for subsea equipment delivery
… platforms or powered autonomous underwater vehicles (AUVs). An alternative would be to augment existing platforms with navigation and guidance capability, enabling them to actively guide themselves to their destination, with minimal added complexity and power consumption. This defines a new …
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Analysis and design of a Formula SAE powertrain
… analyze the MIT Formula SAE car to determine performance of our current and future cars. The conclusion of this analysis will drive the powertrain decisions for our Model Year 2017 (MY 17) and other future cars. Very little data relating to our cars currently exists, but is vital to proper …
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Energy regeneration and control in vehicle suspensions
… suspension while improving the overall dynamical performance of the vehicle. It is shown that typical regenerative devices comprising of a linear-to-rotational element driving a permanent-magnet generator can be simply modelled as a dissipative admittance in parallel with an inerter. This …
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Design and Analysis of a Monocoque Chassis for an Electric Formula SAE Vehicle
… racecar is fundamental to unlocking the maximum vehicle performance by supporting the applied external loads with a low-mass, high-stiffness structure. Thus far, MIT’s Formula SAE team has developed and utilized welded steel tube chassis designs for their racecars due to their relative simplicity …
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Powertrain technology and cost assessment of battery electric vehicles
… This assessment is based on two popular vehicle classes: subcompact and mid-size. Fuel, electricity and battery costs are taken into consideration for this study. Despite remaining challenges and concerns, this study shows that with production level increases and battery price-drops, full …
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